Igniting apparatus.



D. S. COLE.

IGNITING APPARATUS.

APPLICATION FILED MAY 0,1907.

0 11 0d 1 on M d e t n e t a P 2 SHEETS-SHEET 1.

INVENTOR D. S. COLE.

IGNITING APPARATUS. APPLICATION FILED MAY 10,1907.

Patented Mar. 8, 1910.

2 SHEETS-SHEET 2.

itnesszs f:

DWIGHT S. COLE, OF DETROIT, MICHIGAN/ remains APPARATUS.

nearer.

Specification of Letters Patent. Y P t nted Mar. 8, 1910.

Application filed May 10, 1907. 1 Serial No. 372,833.

To altwhom 'it may concern:

Be it known that I, DWIGHT S. Conn, a

citizen of the United States, and a resident of Detroit, in the countyof Wayne and State of Michigan, have invented a new and ImprovedIgniting pparatus, ofwhich the following is a specification.

This invention relates to devices for igniting gas burners, and theobject of my improvements' are :to provide an efiicient and constantlyburning pilot light and igniter that shall consume a minimum of gas whenthe burner or burners which it ignites are not in operation; to providemeanswhereby the constantly burning pilot light shall be I so protectedthat it will not be extinguished by currents of gas or air or by theback puff whenthe main burner is extinguished;

and to provide the commonly employed flame-carrying ignition tubes forlarge burners with an auxiliary constantly burning pilot light of suchsmall size that the normal consumption of gas will be very small.

My invention consists in the combination of a large gas burner, anigniting burner, and a constantly burning pilot light for the ignitingburner.

It also consists in the novel construction whereby the igniter isadapted to receive the sections of two other forms flame from the pilotlight.

It also consists in the novel construction of the connection betweentheburners and the gas main, whereby a temporarily increased blast of gasis provided for the pilot light when it ignites the ignitin burner.

It further consists in a nove protection for the flame of the'pilotlight.

In the accompanying drawings, Figure 1 is a central verticalcrosssection of my lmproved ignlting apparatus in connection wlth' aring burner. Fig. 2 is a side'vlew of the same. Fig. 3 is a Bunsen tubewhich maybe substituted for that shown in Figs. 1 'and'2.

Figs. 4. and .5 aretcross sections respectively.

on the lines 4-4 and 5-5 of Fig. 3. Figs. 6 and 7 are views of anotherformof Bunsen tube. Figs. 8 and 9 are central verticalcross of burnerswith igniters and pilot-lights. l Similar reference characters refer tolike parts throughout the several views. i

Constantly burning igniters for gas burners are usually of considerablesize as they are usually placed near the gas openings of the mainburners. In lighting and extinguishing a burner of the Bunsen type,there becomes explosive and it often happens that the explosion of thismixture when the main flame is turned ofi, extinguishes both the mainburner and the pilot light, if the pilot is small in size,.and in closeproximity to the large burner orifices. Adequately large constantlyburning igniters or pilot lights for direct ignition consume a largeamount of gas and are therefore a considerable constant expense.

, In the drawings of my improved construction, which illustrate myinvention in connection with a ring burner and large igniter, I haveshown an automatic gas-regulating valve, which however forms no part ofthe invention herein claimed.

The main burner is formed of a tubular ring 1 provided with slots 2 forthe escape of gas. The straight cross tube 3 connects is used. The body7 of the valve has a bore, 7 for the piston 8, which piston has a smallpassage 9 throughwhich the pressure in the pipe 11 may be maintained Thefeed pipe ram 2 is a time whenthe mixture of air and gas 10 deliverswater to the right of the piston 8, and if water is drawh o faster thancan be supplied through the orifice 9, the pressure on the left of thepistonbeing relieved, the piston will move to the left. The piston rod1-2 carries a valve 13 atits right end,

seat 14 and permits gas to how to the burner, Metal washers 15 and 16are screwed onto the piston rod 12 and between them is.

mounted a cup shaped leather washer 17. Arin'g 18 screws onto the hub ofthe washer 16 and secures the leather disk 19 m posisubstitute for theleather. form a piston that prevents water from. assing to the right.The ring 20 of cor other suitable material, through whlch the whichvalveis normally seated to close the gas-passage to the burner 1. Whenthe p 1ston moves to the left, the valve 13 leaves Its. .160

tion. ,An other suitable material may be These parts 11o piston rod isslidable, prevents the escape of gas. A small opening 25 is adaptedtorelieve any pressure which-may result from leakage. The valve 'is heldon its seat by the pressure of the water against the washer 15 acting@through the piston and the spring '23 in the manner shown in thedrawings.

and is adapted to conduct gas to the igniter.-

A Bunsen tip 27 is secured to the end of the pipe 26 and onto this maybe. secured the Bunsen tube 28 having air openings 29. The

' tube is so mounted that its flame will ignite the gas passing out ofthe slots- 2 in the main burner.

Projecting into the chamber 30 is the pipe 31 of the constantly burningpilot light,-

which pipe is bent upward "to against the tube 28 as shown, and isprovided with a tip 32. A clamp 33 secures the pipe 31 to y the tube 28.A sleeve 34, having a .flange 35 is slipped onto the pipe 31 before itis bent and secured tightly thereon. A threaded sleeve 36 slips overthis sleeve 34 and screws 3 into a threaded chamber formed around theopening in the body of the valve and thus holds the parts in position. Ashield 37 of mica, metal or other material is carried by the arm38extending upward from the ring 33, which shield contacts with the tube28 just above the'tip 32. This shield not only prevents the flame fromthe tip 32 being blown out by the wind and by explosions, but also shedsthe CO which will decend when the flame from tube 28 is extinguished,

, that is, it prevents the flame from-the tip 32 being extinguished bythe back draft of the igniter.

The tube 28 isprovided with a spiral slot 39, which while wide enough topermit gas to pass through, is not wide enough to permit the passage offlame. When the valve 13 permits gas to pass through pipe 26, a portionwill pass through the slot 39, which will be ignited from the smallpilot light. The flame will travel up along this slot and i itethe gasat the top of the tube, the

ame of which, in turn, will ignite the gas at-the lar e burners; The tip32 is so formed that. its ame under ordinary conditions is quite minute.To strengthen the flame at the time it is to ignite the flame at theslot 39, the following construction is employed. The end 40 of the pipe31 is flared so as to act as a funnel and the part 41 of the passage 30is restricted to cause the flow of gas at this point to be acceleratedwhen the valve l3 permits the gas to flow freely. As

a result, a blast of gas against the funnel 40 causes the flame at thetip 32 to become much larger than before. Instead of a spiral slot 39cut through the tube, I may form the tube with a series of minute holes42 (Figs. 6 and 7) through which the gas may escape in suflicientquantity to carry a flame to the top of the tube 43. Or the tube may beformed of a sheet of metal rolled to form a tube 44 having a crosssection such as shown in Fig.4 at its lower end and a cross section asshown in Fig. 5 at its upper end. Gas can pass out through the fine slotbetween the flanges 45, and carry the flame upward, but the slot is toonarrow to permit the flame to pass through.

In Figs. 8 and9, the main tubes 4 have burner rings as before described.The pilot lights at the end of the tubes 31. and the automatic valves13, are also similar to those shown in Fig. 1. The igniters shown inthese two, figures are of different construction. Instead of a separatepipe leading from the chamber 24 and independent mixers 2729 theigniters are constructed as follows. In Fig. 8 a tube 50 is shown toconnect to the main tube 4 and at its outer end is formed with a burner51 having a vertical slot 52 through which the gas will issue whenthevalve 13 is opened. A shield 53 is secured to the burner 51 toprotect the pilot light. When the valve 13 is opened,

. the gas will rush up through the tube 4 and into the burner ring 1. Atthe same time it will pass out through the tube 50 and through the slot52 in the igniter burner '51, and will ignite from the pilot light. Theflame will travel up along the slot 52 and jump to the slots 2in thering 1. In the structure shown in Fig. 9, the igniter burner 60 isformed as a tube depending from the main burner ring 61, the slot 62permitting a stream of gas to issue near the pilot flame. When the valve13 is opened, gas will rush up into the ring 61 and out through theslots 62 and 63, and will be ignited at the pilot flame. A shield 64protects the pilot flame from being extinguished from the explosioncaused by the shutting off of the gas.

Having now explained my improvements, what I claim as my invention anddesire to secure by Letters Patent, is,-

1. The combination of a main burner, an

-light being connected to the gas supply-connection which is IQStIlCtGdaQJaOBDt the open-.

ing of the pilot light pipe so as to accelerate the feed when theautomatic valve opens.

2. The combination of a'main burner, an igniting burner adjacent theretoand connected to the same source of gas supply, an automatic valve tocontrol said supply, a feed connection to supply gas to said valve, saidigniter being provided with a-gas mixing tube having a'narrow slot, anda constantly burning pilot light adjacent to the lower end of the slot.

3. In a gas burner, the combination of a feed pipe, a mixing tubeconnected to the same, and a constantly burning pilot light beside themixing tube and so positioned.

that the flame will be below the upper. end of said mixing tube, said"tube having an aperture to permit the escape of the gas so it may beignited by the pilot light and to transmit the flame fromthe pilotlightto the top of the tube, and a valve "to control.

the admission of gas to said tube.; I

4. The combination of a valve chamber having a restricted portion,avalve in said chamber above the restricted portion, a'

burner connected to said chamber. above the valve, a pilot light, atubeconnected to said light and extending into saidchamberto a pointbetween the valve and the restricted tions between the chamber andburners, a-

valve controlling the admission of gas to said connections, a pipeextending intosaid chamber below the valve and so bent that its eta-vegpilot light.

6. In a gas burner, the combination of a.

open end meets the current of gas, a burner I at the free end of saidpipe adjacent to the igniting burner, said chamber being so formed thatthe opening of said valve will cause an accelerated flow of gas to saidmain burner in the form of a ring, an auxiliary burner adjacent theretocomprising a v tube having a slot to permit the escape of gas, aconstantly burning pilot light. adjacent to thelowen end of said slot,and a shield over the. pilot-light to prevent its extinction upon theigniting of the main burner.

7 In a gas burner, the combination of a ring shaped main burner, anignitin'g'tube adjacent thereto and provided with a slot to permit theescape of gas through its side,

a pilot light adjacent the lower end of the slot, and a valve to admitgas to the main burner and-igniting tube.

4 8. Ina gas burner, the combination of a main burner-and an ignitintube provided with a longitudinal slot, a valve to admit gas to thesame, a constantly burning pilot light at the lower end of the slot, anda shield over said pilot light to prevent its extinction by theexplosion of the burner ignites.

In testimony whereof Ihave. signed specification in the presence of twosubscribing witnesses.

'DWIGHT S. COLE;

Witnesses:

ELIZABETH M. BROWN, Enwnnn N. PAGELSEN.

gas when the main this

